unproducible
improducible
unproduceable
uncreatable
unbuyable
obviating
preclusive
unimpossible
nonpossible
ungrowable
you can't make a silk purse of a sow's ear
inconstructible
unconstructible
unconstructable
unborable
impossibility
per impossibile
unimplementable
undesignable
unbuildable
uncompilable
uncultivable
unsuppliable
uncomposable
unprocurable
inaccessible
unobtainable
nonpossibility
untouchable
unrepairable
unfreeable
nonconstruction
inextricable
nonharvestable
unproductive
unharvestable
unperformable
sterilize
non-replicable
irreplicable
undoable
unrealizable
uninventable
unachievable
unattainable
unhaveable
uncookable
ingenerable
inobtainable
inoxidizable